Abstracts
Résumé
Objectif Les personnes en situation de crise aiguë qui sollicitent les services d’urgence psychiatrique manifestent une détresse psychologique sévère et présentent probablement des signes physiologiques de stress chronique. Toutefois, comment mesurer au mieux le stress chronique ? Notre étude vise à évaluer la charge allostatique (CA), c’est-à-dire l’ « usure » des systèmes biologiques que nous pouvons mesurer à l’aide de différents marqueurs biologiques appelés biomarqueurs.
Méthode Dans ce protocole utilisant les données de la Biobanque Signature, nous souhaitons évaluer les dimensions biologiques et psychosociales liées aux changements des symptômes psychiatriques chez les patient(e)s consultant à l’urgence psychiatrique. L’évaluation sera faite à 4 moments consécutifs : (T1) 1-4 jours après leur admission à l’urgence ; (T2) à la fin de leur hospitalisation (en moyenne 2 semaines plus tard) ; (T3) lors d’un suivi en consultation externe (en moyenne 2 mois plus tard) ; et (T4) environ 1 an plus tard. Nous prévoyons que : 1) la CA à T1 permettra de distinguer différents troubles psychiatriques ; 2) une CA plus élevée permettra de prédire l’évolution des symptômes au fil du temps ; et 3) que la combinaison de facteurs de risque et de protection modifiables (p. ex. les comportements liés à la santé, les expériences psychosociales) renforcera ou atténuera ces associations observées. Nous avons obtenu un financement conséquent des IRSC afin d’analyser les échantillons de cheveux, de salive et de sang, prélevés et conservés par la Biobanque Signature. Cette analyse constituera des mesures à T1 (N = 1984 ; 40 % de femmes ; âge moyen de 41 ans, avec une fourchette allant de 18 à 81 ans) ainsi qu’à T2 (n = 685), T3 (n = 606) et T4 (n = 370).
Résultats Le projet proposé permettra d’indexer la CA chez les patient(e)s et les 149 participant(e)s témoins sans trouble psychiatrique récent. Parmi les sous-échantillons avec des mesures T2, T3 et T4, nous évaluerons simultanément, de manière prospective, les changements de la CA et les trajectoires des symptômes psychiatriques.
Conclusion De l’admission à la rémission, l’étude des patient(e)s en urgence psychiatrique est une occasion unique d’évaluer des profils extrêmes qui peuvent contribuer à des approches de médecine de précision. La Signature Biobanque apportera des données uniques sur les signatures biologiques des troubles psychiatriques et leur évolution dans le temps, tout en offrant des possibilités de connaissances uniques et renforcement des capacités pour les années à venir, avec le soutien d’une équipe transdisciplinaire.
Mots-clés :
- charge allostatique,
- urgence psychiatrique,
- approches dimensionnelles transdiagnostiques,
- stress chronique,
- psychiatrie biologique
Abstract
Objective People in acute crisis who seek psychiatric emergency services are clearly in great distress and likely already show signs of chronic stress. But how can we best measure chronic stress physiologically? Our study aims to assess allostatic load (AL), the “wear and tear” on biological systems that we can measure using different biological marker called biomarkers.
Method We aim to assess biological and psychosocial dimensions related to psychiatric symptom changes among psychiatric emergency patients repeatedly evaluated at four-time points: (T1) 48-hours upon admission, (T2) end of hospitalization (about 2 weeks later), (T3) external follow-up (about 2 months), and (T4) 1 year later. We expect that (1) AL at T1 will distinguish psychiatric conditions, (2) higher AL will predict symptom trajectories over time, and (3) that combinations of modifiable risk and protective factors (e.g. health-related behaviors, psychosocial experiences) will boost or buffer these associations. We acquired funding in order analyze hair, saliva, and blood samples that have already been collected as part of the Signature Biobank that offers measures at T1 (N=1,984; 40% women; mean age 41 with a range from 18-81) as well as at T2 (n=685), T3 (n=606), & T4 (n=370).
Results In the proposed project, we acquired funding to analyze biobanked tissues to index AL among all PEP and 149 healthy controls. Among subsamples with T2, T3, and T4 measures, we will assess prospectively changes in AL and psychiatric symptoms trajectories simultaneously.
Conclusion From admission to remission, the study of psychiatric emergency patients is a unique opportunity to assess extreme profiles that can help refine precision medicine. The Signature Biobank will provide unique insights on the biological signatures of psychiatric conditions and changes over time while also providing unique knowledge and training opportunities for years to come supported by a transdisciplinary team.
Keywords:
- allostatic load,
- psychiatric emergency,
- transdiagnostic dimensional approaches,
- chronic stress,
- biological psychiatry
Appendices
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